Thermostatic valve



THERMOSTATIC VALVE v Filed June 1, 1936 2 Sheets-Sheet 2 a 46 v E- f 5- 5 I 26 2/ JEi 7 27 7 Jomv DEN/c04 23 INVENTOR Janji ATTORNEY v Patented Nov. l7, 1936' UNITED f STA-Tas- PATENT. ol-Flca smear: THEBMOSTATIO vsnva m mama, Paterson. n. I.

June 1, 1930, Serial no; sacs; a 1M (01. 131-130 Y My application generally to automatic shut-oi! valves employed in fuel lines and actuated by a thermostatic element controlled by the heat from the burning iuel. More particu- 5 larly the device hereinafter disclosed is fllustrated in conjunction with a domestic gas range burner Its purpose is to shut-oil the fuel supply in case the flame should be extinguished accidently, which under ordinary conditions would permit the unburned gas-to escape.

In combination with the general device a novel, manually operated supply valve is employed for the Purpose of turning on the gas and setting the thermostatic device in its normal operating position at the same time. The thermal ring is made of a refractory clay' for improving the action and providing longer life than. ordinary metallic ele-;

ments. A novel latching inechanismis employed for the purpose of automatically holding the shut-oi! valve open during the. interval between Hg.1isa1flanand?lg me'2isa!ronte1eration oi thecomplete device. 7 'llgj isaplanoi'thecmss-headfl'lgsAand 5arestdeelentlonsinsectiononlinesMand' BBrespectivelyoil'igJ.

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The thermostatic device includes a thermostatic element 4. in the form 01 an openring and made preferably of a refractory clay and mounted on a metal base 8; The thermoutatis iastened at one end to the base 8 by screw 1. o

The keeper II is flxed to the free end of the thermal element I and is actuated by the move-- ment or the said element caused by variations in temperature; Said keeper II has the general shape 01' a hammer wherein the handle is at- 10 tached to the thermostatic element 4 and the head, comprised of two oppositely disposed arms, one-beveled at the end and one aquare,'ior engagement with the cold and hot catches respectively as hereinafter explained. A guide roller 15' I is provided to confine the motion 01 the element 4 and keeper II in a direction approximately' at right angles to valve rod l1, or, in other words tangential to the circular thermal ele'mentl. The latching device illustrated particularly in- Figs. 8 and-'9 includes a cold catch ii which is adjustably fastened to the pivoted arm I! by. means of screw 45 inserted through slot l8. 111e term "cold as applied to catch ii is merely asused to indicate the catch which operates to hold the shut-oi! valve open during the period before the thermostat is heated asv tram the hot catch employed thereafter. m arm I! isplvotedat point iltocoupling llwhichinio Inl'ig.8thebeveled thegss'andtheiod operationorturningonthegssandsetflngthe T mechanisln theadjacentbneledethesfl' cold catch II; the latching mechanism including both the cold and hotcatches attached to the valve rod i'l then move in unison to the rightf" under the tension of valve spring 4!; thismo'v'ement is short and continues until the square arm 7 of keeper I'll engages with hot catch It as illustrated in Fig. 9.- As long as the gas continues to burn andthe thermostatic element 4 remains expanded the latching mechanism will be positioned 'as shown in Fig. 9. To prevent distortion of the valve rod l1 and catch I! from an excessive pull on the keeper ll due to over expansion of the thermal element, the guide block It provided with groove is is employed in which the valve rod Q l1 slides. When the flame is ext n hed, the

] thermal element 4 contracts; when the contracprovided to permit adjustments in length and-- position. The cross-head It is provided with a lip 40' having a hole 4| into which the stem of the valve [fits and is secured against rotation by set screw 48. The valve spring 43 is located on the valve rod between the bracket 44, which is attached to the base 8, and the coupling 42.

, The cross-head 38, is provided with guides 81 which are adaptedto flt grooves ll of thevalve chest and slide therein.

-Atthe outer end of the cross-head a cam shaped projection 39 is provided against which the pin operates when the supply valve is provided with .a longitudinal hole 28 and slot 28 in which the knob 26 and the reduced portion 21" turned on and the trigger 23 depressed for setting the latching mechanism and keeper into, engagement. The supply valve is illustrated in detail in Figs. 14 to 18 inclusive; a grip ii is respectively of trigger 23 are retained and guided. when the trigger it is pressed forward the pin 24 slides thru the transverse hole in the stem 22 and.

engages with cam 30 of cross-head ll. The trigger it and pin l4 are depressed by pressure from the fingers of the hand operating the supply 7 valve; a spring as is provided betweenplug ll and knob 28 toreturn the trigger-and pin to their a pressing the trigger 28 and pin 24. The pin 24.

normal position.

The mechanism is operated by turning the supply valve handle 2| and at the same time deslides along the cam 38 forcing the cross-head it toward the burner; the cross-head, being fastened to the valve rod, moves the latching mechanism into engagement with the thermostatic keeper III as illustrated in Fig. 8, at the same time the shut-off valve I is moved off its seat. The

burner is then lit causing the thermostat to egpand until the keeper It is moved onto! engagement with the hot catch ll. Thereafter whether the fuel supply is cut of! by closing the supp valve i .or whether the flame is extinguished in anyother manner, the thermostat will contract and disengage the keeper l0 and hot catch it thereby allowing the shut-off valve I to snap closed under the tension of spring 48.

I claim: x

LA device of the type described comprising a thermostaticelement, a keeper attached to (1 element, a latching mechanism adapted to enin the valve stem and I I spades?" s- When the expansion-of the thermostatis' sufllcient, the keeper l0 (Fig. 8) will release the gage with said keeper and including a valve rod .andvhot catch formed in the end of said valve rod, and a cold catch pivotally mounted on said .valve rod, a shut-on! valve connected tosaid latching mechanism, and a supply valve in combination with means for setting the latching mechanism and keeper into operating engagement.

2. A device of the type described comprising 4 a thermostatic element, a hammer shaped keeper attached to said element provided with a square arm-and a beveled arm, a latching mechanism including a valve rod, a hot catch formed in the end of said rod and adapted to engage with the square arm of said keeper, a cold catch pivotally mounted on said valve rod and adapted to engage with thebeveled arm of said keeper, a'shut-oi! valve connected to said latching mechanism, and a supply valve in combination with means for setting the latching mechani'sm' and keeper into operating engagement.

8. [device of the type described comprising a thermostatic element, a keeper attached to said element provided with a square arm anda beveled arm, a' latching mechanism including a valve rod, a hot catch formed in the end of said rod and adapted to engage with the square arm of said keeper, a cold catch pivotally mounted on said valve rod and adapted tq engage with the beveled arm of said keeper, 9. guide block for preventing distortion of said valve rod and hot catch, a shut-oi! valve connected to said latching mechanism-and a supply valve in combination with means for setting the latching mechanism and keeper into operating engagement.

4. A device of the type described comprising a 8 thermostatic element. a keeper attached to said element, a latching mechanism adapted to engage with said keeper, a shut-off valve connected to said latching mechan a cross-head attached at one end to said shut ofl valve and having the opposite end formed into a cam, and a supply valve in combination with means for setting the latching mechanism and keeper into operating engagement and comprising a hollow grip attached to the supply valve stem, a transverse hole in said stem, a trigger slidably held by said hollow grip, a pin attached to said trigger and ,adapted to slide in the said transverse hole in the valve stem and engage with said cross-head cam when the trigger is pressed forward and the grip rotated on its stem.

5. A latching mechanism comprising a hammer shaped keeper with one beveled and one square arm, a valve rod, a cold catch adjustably mounted on an arm pivotably attae..--ed to the valve rod and adapted to engage with the beveled arm of said keeper, and a hot catch formed in the end of said rod. and adapted to engage with the square arm oi. said keeper after the cold catch has become disengaged therefrom.

6. A supply valve in combination with means for setting a latching mechanism and keeper into operating engagement and comprising a cm, a hollow grip attached to a valve stem. a transverse hole in said stem, a trigger slidably held by said hollow grip, and a pin attached to said trigger and adapted to slide in said transverse hole operatively engage with said cam. Y

7. A device 0! a thermostat, a latching mechanism including a hammer shaped keeper attached to said thermostat, said keeper having one square and one beveled arm, a shut-on valve. a valve rod conthe type described comprising 10 nected to said shut-oi! valve, a hot catch formed lg a,oco,es7 1 3 I in the end of said rod for engagement with the square arm of said keeper, a cold catch adjustably mounted on an arm pivotably attached to said valve rod and adapted to engage with the beveled arm oi. said keeper, and a supply valve in combination with means for setting the latching mechanism and keeper into operating engagement and including a cross-head attached at one end to said shut-oi! valve and provided with a cam at the opposite end, a hollow grip attached to the supply valve stem,-a transverse hole in said stem, a trigger slidably held by said hollow grip, and a pin attached to said trigger and adapted to slide in said transverse hole and operatively engage with saldcam.

JOHN DE NICOLA.- 

